: This study explores the evolution of hierarchical martensitic structures in Ti-12Mo alloy, focusing on the interplay between twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP). Using in-situ Electron Backscatter Diffraction (EBSD) and Transmission Electron Microscopy (TEM), real-time progression of these structures during deformation was captured. The findings reveal a complex hierarchy of primary martensite, along with martensitic twins (110α″ DT and 130α″ DT) as well as additional variants nucleated at primary martensite boundaries. These features enhance work hardening and facilitate coordinated plastic deformation. The interaction between martensite and dislocations significantly strengthens the alloy’s mechanical properties. This research provides valuable insights into the mechanisms of plastic deformation and strain-hardening behavior, offering implications for the design of advanced titanium-based materials.
Ou et al. (Fri,) studied this question.